摘要
探讨了《水质单质磷的测定磷钼蓝分光光度法(暂行)》(HJ 593-2010)中存在的问题,并对方法进行了改进。确定测定目标组分为单质磷中的黄磷;改用酸性高锰酸钾氧化体系,去除了有机磷农药的干扰;改用抗坏血酸为还原剂,采用710 nm比色波长,提高了分析灵敏度;用10 mL甲苯一次萃取,对水中黄磷的检出限为0.002 mg/L。
Problems in Standard method ＂ Water quality-Determination of phosphorus-phosphomolybdenum blue spectrophotometric method＂ （HJ 593-2010） were discussed. And some improvement was carried out. Yellow phosphorus was confirmed to be the analyte. Acidic potassium permanganate oxidation system was used to elimi- nate the interference of organophosphorus pesticides. Analytical sensitivity was improved by using ascorbic acid as a reducing agent and a colorimetric wavelength of 710 nm. The detection limit of yellow phosphorus in water was 0.002 mg/L by extraction with 10 mL toluene.
出处
《环境监测管理与技术》
2013年第1期33-36,共4页
The Administration and Technique of Environmental Monitoring
关键词
黄磷
磷钼蓝分光光度法
水质
Yellow phosphorous
Phosphomolybdenum blue spectrophotometric method
Water quality
